A explosion chamber device and circuit breaker for circuit breaker

The embodiment of the utility model provides an in disclose an explosion chamber device and circuit breaker for circuit breaker, spacing fixed each other between two lateral walls of this explosion chamber device and the arc extinguishing bars piece because that arc extinguishing bars piece warp is little, can keep its intrinsic shape under the electric arc heat under high temperature, so, can restrict the lateral wall through arc extinguishing bars piece and lead to reducing of inner chamber size owing to deformation, and then can avoid the extrusion between lateral wall and the movable contact bridge, eliminate because the lateral wall warp the lateral wall of production and the frictional resistance between the movable contact bridge, effectively ensure the movable contact bridge and touch the bridge and support reliable smooth -going up -and -down motion. 本实用新型实施例中公开了种用于断路器的灭弧室装置及断路器，该灭弧室装置的两个侧壁与灭弧栅片之间相互限位固定，由于灭弧栅片在高温下变形小，在电弧热量下能够保持其固有的形状，如此，通过灭弧栅片能够限制侧壁由于形变而导致内腔尺寸的减小，进而能够避免侧壁与动触桥之间的挤压，消除由于侧壁变形产生的侧壁与动触桥之间